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參數(shù)資料
| 型號(hào)： | HM91710B |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | TONE/PULSE SWITCHABLE DIALER |
| 中文描述： | 音頻/脈沖可切換撥號(hào)器 |
| 文件頁數(shù)： | 4/19頁 |
| 文件大?。?/td> | 131K |
| 代理商： | HM91710B |
* This specification are subject to be changed without notice.
HM91710A/B
TONE/PULSE SWITCHABLE DIALER
4
1.7.2002
Symbol
Function
TONE
HFI
HFO
Dual Tone Multi-frequency output pin.
In TONE mode, when a entry of digit key (include * , # key), this pin will sent out a corresponding
DTMF signal.
The TONE pin provides minimum tone duration (t
),& minimum intertone pause time to support rapid
key-in. If key-in time is less than t
TD
, DTMF signal will last for t
TD
, otherwise the tone duration will
last as long as the key is pressed.
Handfree input control pin.
Toggle input sturcture, falling edge trigger.
It is used to enable and disable Handfree function.
With waveshaped by a built-in Schmit trigger, the bounce of input can be eliminated by external R,
C debounce circuit.
A built-in pull up resistor is 200K typical.
Handfree output pin.
Inverter output structure (normally "low", active "high").
When a HFI pin is active, Handfree function will be enabled (HFO=1) or disabled (HFO=0).
When the Handfree function is enable (HFO=1), after OFF-HOOK action, it can reset Handfree
function and HFO pin return to "low" state.
FUNCTION DESCRIPTION
Keyboard Operation
Symbol definitions:
a).
↑
b).
↓
c). D
1
.....D
n
d). D
P1
... D
Pn
: Pulse digit ; 1,2,3,4,5,6,7,8,9,0, (C
... C
is same as D
... D
).
e). D
t1
....D
tn
: Tone digit ; 1,2,3,4,5,6,7,8,9,0,*, # (C
t1
....C
tn
is same as D
t1
....D
tn
).
f). t
F
: Flash time.
g). t
P
: Pause time.
h). t
PT
: Pulse to Tone wait time.
i). t
FP
: Pause time for flash.
j). t
: Pause time for redial.
k). LNB
: Last number redial buffer.
: OFF-HOOK or enable Hand Free function.
: ON-HOOK or disable Hand Free function.
: Digit key; 1,2,3,4,5,6,7,8,9,0,*,# (C
1
.....C
n
is same as D
1
.....D
n
).
A. Normal Dialing
1. Digit Dialing
Procedure :
↑
D1,D2 . . . . . ., Dn
↓
Dial out
: Dt1, Dt2 . . . . . . ., Dtn in tone mode
Dial out
: Dp1, Dp2 . . . . . ., Dpn in pulse mode
LNB
: D1, D2 . . . . . . Dn
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